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        <h1 id="Neo4j-学习"><a href="#Neo4j-学习" class="headerlink" title="Neo4j 学习"></a>Neo4j 学习</h1><h1 id="目录"><a href="#目录" class="headerlink" title="目录"></a>目录</h1><h2 id="1-入门"><a href="#1-入门" class="headerlink" title="1. 入门"></a>1. 入门</h2><h3 id="1-1-安装neo4j"><a href="#1-1-安装neo4j" class="headerlink" title="1.1 安装neo4j"></a>1.1 安装neo4j</h3><p>直接安装 neo4j desktop 版本</p>
<p>如果是community 社区版本，则需要到安装目录的bin 下面执行如下命令</p>
<a id="more"></a>

<h2 id="2-Cypher简介"><a href="#2-Cypher简介" class="headerlink" title="2. Cypher简介"></a>2. <span class="exturl" data-url="aHR0cHM6Ly9uZW80ai5jb20vZG9jcy9nZXR0aW5nLXN0YXJ0ZWQvY3VycmVudC9jeXBoZXItaW50cm8v" title="https://neo4j.com/docs/getting-started/current/cypher-intro/">Cypher简介<i class="fa fa-external-link"></i></span></h2><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">()</span><br><span class="line">(matrix)</span><br><span class="line">(:Movie)</span><br><span class="line">(matrix:Movie)</span><br><span class="line">(matrix:Movie &#123;title: &quot;The Matrix&quot;&#125;)</span><br><span class="line">(matrix:Movie &#123;title: &quot;The Matrix&quot;, released: 1997&#125;)</span><br></pre></td></tr></table></figure>

<h3 id="2-1-关系语法"><a href="#2-1-关系语法" class="headerlink" title="2.1 关系语法"></a>2.1 关系语法</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">--&gt;</span><br><span class="line">-[role]-&gt;</span><br><span class="line">-[:ACTED_IN]-&gt;</span><br><span class="line">-[role:ACTED_IN]-&gt;</span><br><span class="line">-[role:ACTED_IN &#123;roles: [&quot;Neo&quot;]&#125;]-&gt;</span><br></pre></td></tr></table></figure>

<h3 id="2-2-模式语法"><a href="#2-2-模式语法" class="headerlink" title="2.2 模式语法"></a>2.2 模式语法</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">(keanu:Person:Actor &#123;name:  &quot;Keanu Reeves&quot;&#125; )</span><br><span class="line">-[role:ACTED_IN     &#123;roles: [&quot;Neo&quot;] &#125; ]-&gt;</span><br><span class="line">(matrix:Movie       &#123;title: &quot;The Matrix&quot;&#125; )</span><br></pre></td></tr></table></figure>

<h2 id="3-Cypher-基本语法"><a href="#3-Cypher-基本语法" class="headerlink" title="3. Cypher 基本语法"></a>3. Cypher 基本语法</h2><h3 id="3-1-创建数据"><a href="#3-1-创建数据" class="headerlink" title="3.1 创建数据"></a>3.1 创建数据</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">CREATE (:MyMovie&#123;title:&quot;The Matrix&quot;, released:1997&#125;)</span><br></pre></td></tr></table></figure>

<h3 id="3-2-创建并且返回数据"><a href="#3-2-创建并且返回数据" class="headerlink" title="3.2 创建并且返回数据"></a>3.2 创建并且返回数据</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">CREATE (p:MyPeron&#123; name:&quot;test&quot;, relase:&quot;test&quot;&#125;) RETURN p</span><br></pre></td></tr></table></figure>

<h3 id="3-3-创建多个元素"><a href="#3-3-创建多个元素" class="headerlink" title="3.3 创建多个元素"></a>3.3 创建多个元素</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">CREATE (a:Person &#123; name:&quot;Tom Hanks&quot;,</span><br><span class="line">  born:1956 &#125;)-[r:ACTED_IN &#123; roles: [&quot;Forrest&quot;]&#125;]-&gt;(m:Movie &#123; title:&quot;Forrest Gump&quot;,released:1994 &#125;)</span><br><span class="line">                                                               </span><br><span class="line">CREATE (d:Person &#123; name:&quot;Robert Zemeckis&quot;, born:1951 &#125;)-[:DIRECTED]-&gt;(m)</span><br><span class="line">RETURN a,d,r,m</span><br></pre></td></tr></table></figure>

<h3 id="3-4-匹配模式"><a href="#3-4-匹配模式" class="headerlink" title="3.4 匹配模式"></a>3.4 匹配模式</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">MATCH (p:Person &#123; name:&quot;Tom Hanks&quot; &#125;)-[r:ACTED_IN]-&gt;(m:Movie)</span><br><span class="line">RETURN m.title, r.roles</span><br></pre></td></tr></table></figure>

<h3 id="3-5-连接结构"><a href="#3-5-连接结构" class="headerlink" title="3.5 连接结构"></a>3.5 连接结构</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">MATCH (p:Person &#123; name:&quot;Tom Hanks&quot; &#125;)</span><br><span class="line">CREATE (m:Movie &#123; title:&quot;Cloud Atlas&quot;,released:2012 &#125;)</span><br><span class="line">CREATE (p)-[r:ACTED_IN &#123; roles: [&#39;Zachry&#39;]&#125;]-&gt;(m)</span><br><span class="line">RETURN p,r,m</span><br></pre></td></tr></table></figure>

<h3 id="3-6-完成模式"><a href="#3-6-完成模式" class="headerlink" title="3.6 完成模式"></a>3.6 完成模式</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">MERGE (m:Movie &#123; title:&quot;Cloud Atlas&quot; &#125;)</span><br><span class="line">ON CREATE SET m.released &#x3D; 2012</span><br><span class="line">RETURN m</span><br></pre></td></tr></table></figure>

<p>使用合并关联多个</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">MATCH (m:Movie &#123; title:&quot;Cloud Atlas&quot; &#125;)</span><br><span class="line">MATCH (p:Person &#123; name:&quot;Tom Hanks&quot; &#125;)</span><br><span class="line">MERGE (p)-[r:ACTED_IN]-&gt;(m)</span><br><span class="line">ON CREATE SET r.roles &#x3D;[&#39;Zachry&#39;]</span><br><span class="line">RETURN p,r,m</span><br></pre></td></tr></table></figure>

<p>处理多重关联</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">CREATE (y:Year &#123; year:2014 &#125;)</span><br><span class="line">MERGE (y)&lt;-[:IN_YEAR]-(m10:Month &#123; month:10 &#125;)</span><br><span class="line">MERGE (y)&lt;-[:IN_YEAR]-(m11:Month &#123; month:11 &#125;)</span><br><span class="line">RETURN y,m10,m11</span><br></pre></td></tr></table></figure>

<h2 id="4-Cypher-筛选结果正确的结果"><a href="#4-Cypher-筛选结果正确的结果" class="headerlink" title="4. Cypher 筛选结果正确的结果"></a>4. Cypher 筛选结果正确的结果</h2><h3 id="4-1-测试数据"><a href="#4-1-测试数据" class="headerlink" title="4.1 测试数据"></a>4.1 测试数据</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line">CREATE (xiaohong:Person &#123;name: &quot;小红&quot;, born: 1954&#125;)</span><br><span class="line">CREATE (xiaolv:Person &#123;name: &quot;小绿S&quot;, born: 1964&#125;)</span><br><span class="line">CREATE (xiaohuang:Person &#123;name: &quot;小黄&quot;, born: 1948&#125;)</span><br><span class="line">CREATE (xiaolan:Person &#123;name: &quot;小蓝&quot;, born: 1999&#125;)</span><br><span class="line">CREATE (xiyouji:Person &#123;name: &quot;西游记&quot;, date: &quot;1999-10-25&quot;&#125;)</span><br><span class="line">CREATE (lanjingling:Person &#123;name: &quot;蓝精灵&quot;, date: &quot;1969-5-16&quot;&#125;)</span><br><span class="line">CREATE (xiaolv)-[:ACTED_IN &#123; roles: [&quot;想看&quot;]&#125;]-&gt;(xiyouji)</span><br><span class="line">CREATE (xiaohuang)-[:ACTED_IN &#123; roles: [&quot;想看&quot;]&#125;]-&gt;(lanjingling)</span><br></pre></td></tr></table></figure>

<h3 id="4-2-根据where-条件查找"><a href="#4-2-根据where-条件查找" class="headerlink" title="4.2 根据where 条件查找"></a>4.2 根据where 条件查找</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">MATCH (xiyouji:Person) WHERE xiyouji.name&#x3D;&quot;西游记&quot; RETURN xiyouji</span><br></pre></td></tr></table></figure>

<p>等同于如下查询</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">MATCH (xiyouji:Person &#123;name:&quot;西游记&quot;&#125;) RETURN xiyouji</span><br></pre></td></tr></table></figure>

<p>使用正则匹配如下</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">MATCH (xiaolv:Person)-[r:ACTED_IN]-&gt;(xiyouji) WHERE xiaolv.name &#x3D;~ &quot;小+&quot; OR &quot;Neo&quot; IN r.roles RETURN xiaolv,r,xiyouji</span><br></pre></td></tr></table></figure>

<h3 id="4-3-内置函数使用"><a href="#4-3-内置函数使用" class="headerlink" title="4.3 内置函数使用"></a>4.3 内置函数使用</h3><h4 id="使用NOT-排除关系"><a href="#使用NOT-排除关系" class="headerlink" title="使用NOT 排除关系"></a>使用NOT 排除关系</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">MATCH (p:Person)-[:ACTED_IN]-&gt;(m)</span><br><span class="line">WHERE NOT (p)-[:DIRECTED]-&gt;()</span><br><span class="line">RETURN p,m</span><br></pre></td></tr></table></figure>

<h4 id="内置函数的"><a href="#内置函数的" class="headerlink" title="内置函数的"></a>内置函数的</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">MATCH (p:Person) RETURN p,p.name AS name, toUpper(p.name), coalesce(p.name, &quot;n&#x2F;a&quot;) AS nickname, &#123; name: p.name, label: head(labels(p))&#125; AS person</span><br></pre></td></tr></table></figure>

<h3 id="4-4-汇总信息"><a href="#4-4-汇总信息" class="headerlink" title="4.4 汇总信息"></a>4.4 汇总信息</h3><h4 id="使用count"><a href="#使用count" class="headerlink" title="使用count"></a>使用count</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">MATCH (:Person)</span><br><span class="line">RETURN count(*) AS people</span><br></pre></td></tr></table></figure>

<h4 id="使用"><a href="#使用" class="headerlink" title="使用"></a>使用</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">MATCH (actor:Person)-[:ACTED_IN]-&gt;(movie:Movie)&lt;-[:DIRECTED]-(director:Person) RETURN actor, director, count(*) AS collacbotration</span><br></pre></td></tr></table></figure>

<h3 id="4-5-排序和分页"><a href="#4-5-排序和分页" class="headerlink" title="4.5 排序和分页"></a>4.5 排序和分页</h3><h4 id="使用-limit-以及-skip-进行分页"><a href="#使用-limit-以及-skip-进行分页" class="headerlink" title="使用 limit 以及 skip 进行分页"></a>使用 limit 以及 skip 进行分页</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">MATCH (a:Person)-[:ACTED_IN]-&gt;(m:Movie) RETURN a, count(*) AS appearances ORDER BY appearances DESC LIMIT 10</span><br><span class="line">MATCH (a:Person)-[:ACTED_IN]-&gt;(m:Movie) RETURN a, count(*) AS appearances ORDER BY appearances DESC SKIP 10</span><br></pre></td></tr></table></figure>

<h3 id="4-6-收集汇总"><a href="#4-6-收集汇总" class="headerlink" title="4.6 收集汇总"></a>4.6 收集汇总</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">MATCH (m:Movie)&lt;-[:ACTED_IN]-(a:Person) RETURN m.title AS movie, collect(a.name) AS cast, count(*) AS actors</span><br></pre></td></tr></table></figure>

<h3 id="4-7-使用UNION链接多个内容"><a href="#4-7-使用UNION链接多个内容" class="headerlink" title="4.7 使用UNION链接多个内容"></a>4.7 使用UNION链接多个内容</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">MATCH (actor:Person)-[r:ACTED_IN]-&gt;(movie:Movie)</span><br><span class="line">RETURN actor.name AS name, type(r) AS type, movie.title AS title</span><br><span class="line">UNION</span><br><span class="line">MATCH (director:Person)-[r:DIRECTED]-&gt;(movie:Movie)</span><br><span class="line">RETURN director.name AS name, type(r) AS type, movie.title AS title</span><br></pre></td></tr></table></figure>

<h4 id="使用WITH"><a href="#使用WITH" class="headerlink" title="使用WITH"></a>使用WITH</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">MATCH (person:Person)-[:ACTED_IN]-&gt;(m:Movie) WITH person, count(*) AS appear, collect(m.title) AS movies WHERE appear&gt;1 RETURN person.name, appear, movies</span><br></pre></td></tr></table></figure>

<h3 id="4-8-使用约束"><a href="#4-8-使用约束" class="headerlink" title="4.8 使用约束"></a>4.8 使用约束</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">CREATE CONSTRAINT ON (movie:Movie) ASSERT movie.title IS UNIQUE</span><br><span class="line">CALL db.constraints</span><br></pre></td></tr></table></figure>

<h3 id="4-9-使用import-导入数据"><a href="#4-9-使用import-导入数据" class="headerlink" title="4.9 使用import 导入数据"></a>4.9 使用import 导入数据</h3><p><span class="exturl" data-url="aHR0cHM6Ly9uZW80ai5jb20vZG9jcy9jeXBoZXItbWFudWFsLzMuNS9jbGF1c2VzL2xvYWQtY3N2Lw==" title="https://neo4j.com/docs/cypher-manual/3.5/clauses/load-csv/">https://neo4j.com/docs/cypher-manual/3.5/clauses/load-csv/<i class="fa fa-external-link"></i></span></p>
<h4 id="从CSV文件导入数据"><a href="#从CSV文件导入数据" class="headerlink" title="从CSV文件导入数据"></a>从CSV文件导入数据</h4><p>要使用的CSV文件<code>LOAD CSV</code>必须具有以下特征：</p>
<ul>
<li>字符编码为UTF-8；</li>
<li>终端线终端取决于系统，例如，它<code>\n</code>在UNIX上还是<code>\r\n</code>在Windows上；</li>
<li>默认的字段终止符是<code>,</code>;</li>
<li>可以使用命令中<code>FIELDTERMINATOR</code>可用的选项来更改字段终止符<code>LOAD CSV</code>；</li>
<li>CSV文件中允许带引号的字符串，并且在读取数据时将引号删除；</li>
<li>字符串引号的字符为双引号<code>&quot;</code>;</li>
<li>if <code>dbms.import.csv.legacy_quote_escaping</code>设置为默认值<code>true</code>，<code>\</code>用作转义字符；</li>
<li>双引号必须在带引号的字符串中并使用转义符或第二个双引号进行转义。</li>
</ul>
<p>下面为示例：</p>
<p>article.cvs</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">1,ABBA,1992</span><br><span class="line">2,Roxette,1986</span><br><span class="line">3,Europe,1979</span><br><span class="line">4,The Cardigans,1992</span><br><span class="line">LOAD CSV FROM &#39;file:&#x2F;&#x2F;&#x2F;article.cvs&#39; AS line</span><br><span class="line">CREATE (:Artist &#123; name: line[1], year: toInteger(line[2])&#125;)</span><br></pre></td></tr></table></figure>

<p>注意此处会踩坑，因为neo4j 默认配置中将import 设置到安装根目录的<code>import</code> 目录下面</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">dbms.security.allow_csv_import_from_file_urls&#x3D;true</span><br><span class="line"></span><br><span class="line">dbms.directories.import&#x3D;import</span><br></pre></td></tr></table></figure>

<p>注意第一个配置默认为false， 设置为true将允许neo4j访问系统文件，这样做是<strong>不建议</strong>的</p>
<p>注意linux 系统的用户访问权限的问题</p>
<h4 id="使用header-导入-csv文件"><a href="#使用header-导入-csv文件" class="headerlink" title="使用header 导入 csv文件"></a>使用header 导入 csv文件</h4><p>article_with_head.csv</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">Id,Name,Year</span><br><span class="line">1,ABBA,1992</span><br><span class="line">2,Roxette,1986</span><br><span class="line">3,Europe,1979</span><br><span class="line">4,The Cardigans,1992</span><br></pre></td></tr></table></figure>

<p>注意语法有稍微的改变</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">LOAD CSV WITH HEADERS FROM &#39;file:&#x2F;&#x2F;&#x2F;article_with_head.csv&#39; AS line</span><br><span class="line">CREATE (:Artist &#123; name: line.Name, year: toInteger(line.Year)&#125;)</span><br></pre></td></tr></table></figure>

<h4 id="使用自定义字段定界符从CSV文件导入数据"><a href="#使用自定义字段定界符从CSV文件导入数据" class="headerlink" title="使用自定义字段定界符从CSV文件导入数据"></a>使用自定义字段定界符从CSV文件导入数据</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">LOAD CSV FROM &#39;file:&#x2F;&#x2F;&#x2F;article_fieldterminator.csv&#39; AS line FIELDTERMINATOR &#39;;&#39;</span><br><span class="line">CREATE (:Artist &#123; name: line[1], year: toInteger(line[2])&#125;)</span><br></pre></td></tr></table></figure>

<h4 id="导入大量数据"><a href="#导入大量数据" class="headerlink" title="导入大量数据"></a>导入大量数据</h4><p>可以指定读取多少行之后提交，防止数据过大，减少内存开销</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">USING PERIODIC COMMIT LOAD CSV FROM &#39;file:&#x2F;&#x2F;&#x2F;artists.csv&#39; AS line CREATE (:Artist &#123; name: line[1], year: toInteger(line[2])&#125;)</span><br></pre></td></tr></table></figure>

<h4 id="设置定期提交的速率"><a href="#设置定期提交的速率" class="headerlink" title="设置定期提交的速率"></a>设置定期提交的速率</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">USING PERIODIC COMMIT 500 LOAD CSV FROM &#39;file:&#x2F;&#x2F;&#x2F;artists.csv&#39; AS line CREATE (:Artist &#123; name: line[1], year: toInteger(line[2])&#125;)</span><br></pre></td></tr></table></figure><script type="text/javascript" src="https://cdn.jsdelivr.net/npm/kity@2.0.4/dist/kity.min.js"></script><script type="text/javascript" src="https://cdn.jsdelivr.net/npm/kityminder-core@1.4.50/dist/kityminder.core.min.js"></script><script defer="true" type="text/javascript" src="https://cdn.jsdelivr.net/npm/hexo-simple-mindmap@0.2.0/dist/mindmap.min.js"></script><link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/npm/hexo-simple-mindmap@0.2.0/dist/mindmap.min.css">
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          <div class="post-toc motion-element"><ol class="nav"><li class="nav-item nav-level-1"><a class="nav-link" href="#Neo4j-学习"><span class="nav-number">1.</span> <span class="nav-text">Neo4j 学习</span></a></li><li class="nav-item nav-level-1"><a class="nav-link" href="#目录"><span class="nav-number">2.</span> <span class="nav-text">目录</span></a><ol class="nav-child"><li class="nav-item nav-level-2"><a class="nav-link" href="#1-入门"><span class="nav-number">2.1.</span> <span class="nav-text">1. 入门</span></a><ol class="nav-child"><li class="nav-item nav-level-3"><a class="nav-link" href="#1-1-安装neo4j"><span class="nav-number">2.1.1.</span> <span class="nav-text">1.1 安装neo4j</span></a></li></ol></li><li class="nav-item nav-level-2"><a class="nav-link" href="#2-Cypher简介"><span class="nav-number">2.2.</span> <span class="nav-text">2. Cypher简介</span></a><ol class="nav-child"><li class="nav-item nav-level-3"><a class="nav-link" href="#2-1-关系语法"><span class="nav-number">2.2.1.</span> <span class="nav-text">2.1 关系语法</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#2-2-模式语法"><span class="nav-number">2.2.2.</span> <span class="nav-text">2.2 模式语法</span></a></li></ol></li><li class="nav-item nav-level-2"><a class="nav-link" href="#3-Cypher-基本语法"><span class="nav-number">2.3.</span> <span class="nav-text">3. Cypher 基本语法</span></a><ol class="nav-child"><li class="nav-item nav-level-3"><a class="nav-link" href="#3-1-创建数据"><span class="nav-number">2.3.1.</span> <span class="nav-text">3.1 创建数据</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#3-2-创建并且返回数据"><span class="nav-number">2.3.2.</span> <span class="nav-text">3.2 创建并且返回数据</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#3-3-创建多个元素"><span class="nav-number">2.3.3.</span> <span class="nav-text">3.3 创建多个元素</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#3-4-匹配模式"><span class="nav-number">2.3.4.</span> <span class="nav-text">3.4 匹配模式</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#3-5-连接结构"><span class="nav-number">2.3.5.</span> <span class="nav-text">3.5 连接结构</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#3-6-完成模式"><span class="nav-number">2.3.6.</span> <span class="nav-text">3.6 完成模式</span></a></li></ol></li><li class="nav-item nav-level-2"><a class="nav-link" href="#4-Cypher-筛选结果正确的结果"><span class="nav-number">2.4.</span> <span class="nav-text">4. Cypher 筛选结果正确的结果</span></a><ol class="nav-child"><li class="nav-item nav-level-3"><a class="nav-link" href="#4-1-测试数据"><span class="nav-number">2.4.1.</span> <span class="nav-text">4.1 测试数据</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#4-2-根据where-条件查找"><span class="nav-number">2.4.2.</span> <span class="nav-text">4.2 根据where 条件查找</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#4-3-内置函数使用"><span class="nav-number">2.4.3.</span> <span class="nav-text">4.3 内置函数使用</span></a><ol class="nav-child"><li class="nav-item nav-level-4"><a class="nav-link" href="#使用NOT-排除关系"><span class="nav-number">2.4.3.1.</span> <span class="nav-text">使用NOT 排除关系</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#内置函数的"><span class="nav-number">2.4.3.2.</span> <span class="nav-text">内置函数的</span></a></li></ol></li><li class="nav-item nav-level-3"><a class="nav-link" href="#4-4-汇总信息"><span class="nav-number">2.4.4.</span> <span class="nav-text">4.4 汇总信息</span></a><ol class="nav-child"><li class="nav-item nav-level-4"><a class="nav-link" href="#使用count"><span class="nav-number">2.4.4.1.</span> <span class="nav-text">使用count</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#使用"><span class="nav-number">2.4.4.2.</span> <span class="nav-text">使用</span></a></li></ol></li><li class="nav-item nav-level-3"><a class="nav-link" href="#4-5-排序和分页"><span class="nav-number">2.4.5.</span> <span class="nav-text">4.5 排序和分页</span></a><ol class="nav-child"><li class="nav-item nav-level-4"><a class="nav-link" href="#使用-limit-以及-skip-进行分页"><span class="nav-number">2.4.5.1.</span> <span class="nav-text">使用 limit 以及 skip 进行分页</span></a></li></ol></li><li class="nav-item nav-level-3"><a class="nav-link" href="#4-6-收集汇总"><span class="nav-number">2.4.6.</span> <span class="nav-text">4.6 收集汇总</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#4-7-使用UNION链接多个内容"><span class="nav-number">2.4.7.</span> <span class="nav-text">4.7 使用UNION链接多个内容</span></a><ol class="nav-child"><li class="nav-item nav-level-4"><a class="nav-link" href="#使用WITH"><span class="nav-number">2.4.7.1.</span> <span class="nav-text">使用WITH</span></a></li></ol></li><li class="nav-item nav-level-3"><a class="nav-link" href="#4-8-使用约束"><span class="nav-number">2.4.8.</span> <span class="nav-text">4.8 使用约束</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#4-9-使用import-导入数据"><span class="nav-number">2.4.9.</span> <span class="nav-text">4.9 使用import 导入数据</span></a><ol class="nav-child"><li class="nav-item nav-level-4"><a class="nav-link" href="#从CSV文件导入数据"><span class="nav-number">2.4.9.1.</span> <span class="nav-text">从CSV文件导入数据</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#使用header-导入-csv文件"><span class="nav-number">2.4.9.2.</span> <span class="nav-text">使用header 导入 csv文件</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#使用自定义字段定界符从CSV文件导入数据"><span class="nav-number">2.4.9.3.</span> <span class="nav-text">使用自定义字段定界符从CSV文件导入数据</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#导入大量数据"><span class="nav-number">2.4.9.4.</span> <span class="nav-text">导入大量数据</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#设置定期提交的速率"><span class="nav-number">2.4.9.5.</span> <span class="nav-text">设置定期提交的速率</span></a></li></ol></li></ol></li></ol></li></ol></div>
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